Speaker



FIG. 1 is front perspective view of a speaker showing my new design;

FIG. 2 is a front side elevational view thereof;

FIG. 3 is a back side elevational view thereof;

FIG. 4 is a side elevational view thereof;

FIG. 5 is another side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines indicate unclaimed portions and form no part of the claimed design. 

CLAIM The ornamental design for a speaker, as shown and described. 